Note 16 - Accumulated Other Comprehensive Income (Loss) - Accumulated Other Comprehensive Income (loss) by Component (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Balance	$ 874,711	$ 794,368	$ 858,103	$ 760,432
Balance	894,535	808,082	894,535	808,082
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Balance	(97,453)	(101,431)	(92,678)	(115,648)
Net current period other comprehensive income (loss)	(307)	(8,310)	(5,082)	5,907
Balance	(97,760)	(109,741)	(97,760)	(109,741)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Balance	2,340	376	(179)	0
Net current period other comprehensive income (loss)	381	1,837	2,900	2,213
Balance	2,721	2,213	2,721	2,213
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Balance	59	112	59	112
Net current period other comprehensive income (loss)	0	0	0	0
Balance	59	112	59	112
AOCI Attributable to Parent [Member]
Balance	(95,054)	(100,943)	(92,798)	(115,536)
Net current period other comprehensive income (loss)	74	(6,473)	(2,182)	8,120
Balance	$ (94,980)	$ (107,416)	$ (94,980)	$ (107,416)